4000 Double-Hung & Sliding Replacement Windows

Why The 4000 Series is The Preferred Option for Customers

At Window World, we are praised for elegant and high-quality double-hung windows. Our models are strategically engineered to endure the elements while looking beautiful and saving energy.

What Do Double-Hung Windows Look Like?

What Do Slider Windows Look Like?

4000 Series Windows

Featuring a beautifully refined silhouette and advanced energy-saving technology, our 4000 Series delivers exceptional style, strength, energy efficiency and value – everything today’s homeowners are looking for in a quality replacement window, and more. They are constructed to improve energy efficiency and lower your monthly energy bills. They perform year-round. See why our 4000 series double hung window is ideal for your home and your wallet!

Best-in-Class Performance Features:

The reinforced narrow silhouette frame and ash profiles make a statement of style with their low-profile design. As a result, it creates a beautiful and expanded glass area. Furthermore, under the surface, internal chambers increase structural integrity, rigidity, and energy efficiency.

In addition, composite meeting-rail reinforcement allows for secure mounting of hardware. The non-conductive material helps reduce the transfer of energy.

Moreover, end-of-throw cam shift locking delivers increased strength and protection to the recessed lock. It also included an “unlocked” indicator.

Equally important, the smooth and uniform true sloped sill quickly directs water runoff without the use of weep holes. As a result, it keeps the exterior of the window clean and attractive.

Also, our telescoping sill dam delivers a triple payoff. Not only does it provide protection from air and water infiltration but also increases structural stability along with enhanced beauty.

When extreme window and weather hit, our proprietary sill interlock stands strong. Traditional sloped sill designs can allow the sash to bow during powerful windows. But, with our interlocking sash-to-sill technology, the sash is channeled firmly into the window frame for a unified wall of strength.

Finally, our innovative screen bulb seal creates a snug fit that eliminates light and insect penetration between the screen and frame. It also aids in easy screen installation and removal.

On our sliding windows, the sashes glide horizontally for easy opening and closing. Both sashes lift out for convenient cleaning. The nylon-encased dual brass roller system for smooth gliding performance.

Insulated Glass  

Maximize your energy savings by choosing a high-performance SolarZone insulated glass package to meet your specific climate challenges. The lower the U-Value, the less energy you’ll need to heat your home. The lower the Solar Heat Coefficient (SHGC), the more you’ll conserve on air-conditioning..

Interior Woodgrains and Exterior Colors

Window World windows are available in a variety of rich hues and natural-looking wood finishes that are remarkably strong and fade-resistant. They transform the appearance of your home both inside and out with visually exciting colors and warm spices of wood. Homeowners can achieve the appealing beauty of custom-crafted wood windows without the time-consuming maintenance because of our architecturally coordinated exterior window colors in high-performance finishes.





Interior Grids

Window grids are available in class colors in the standard configurations of Colonial, Diamond, Prairie, and Double Prairie patterns. Contoured Colonial grids are available in complementary colors and matching woodgrains.

Glass Cuts

Looking for a touch of elegance that won’t obstruct the view? A selection of V-grooved glass patterns is available in the Window World Collection.

The next-generation 4000 Series is precision-engineered to meet or exceed stringent ENERGY STAR requirements, providing triple-pane energy-saving performance in a dual-pane unit. The dual-pane double-strength insulated glass, thermally optimized frame and sash, as well as the non-conductive composite reinforcements, are just part of the advanced energy engineering that puts 4000 Series Windows in a class of their own – premium window performance with everyday affordability.

With Window World windows, your home will have a fresh, energy-efficient, low-maintenance solution backed by a lifetime warranty.* Schedule a free estimate today and start saving on your energy bills.


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